<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改商品页面</h1>
    <input type="text" v-model="product.id">
    <input type="text" v-model="product.title">
    <input type="text" v-model="product.price">
    <input type="text" v-model="product.num">
    <input type="button" value="修改商品" @click="update()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            product: {
                id: "", title: "", price: "", num: ""
            }
        },
        methods: {
            update() {
                axios.post("/update",v.product).then(function (response){
                    alert("修改完成!");
                    location.herf="/list.html";//返回列表页面
                })

            }
        },
        created: function () {
            //发送请求获取修改商品的信息
            //location.search得到?以及参数 ?id=4
            axios.get("/selectById" + location.search).then(function (response) {
                v.product = response.data;
            })
        }
    })
</script>

</body>
</html>